As a Premier Mandatory event on the WTA and an ATP 500 for the men, the China Open in Beijing is one of the biggest combined stops on tour each year. The tournament is also known for its extravagant player party, which never seems to disappoint.

The stars—including all four 2019 women's Grand Slam winners—stepped out at Beijing's Olympic Tower on Sunday, and the looks were simply too good. Here are some of the photos:

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When Bianca Andreescu won $1.3 million for her first WTA title, in Indian Wells, she told reporters that the one luxury item she wanted to buy was a Louis Vuitton purse. Now that she's also won the Rogers Cup and the US Open, she could afford the shoes as well.

Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party

Getty Images

Alexander Zverev defeated Frances Tiafoe, 6-3, 6-2, in the opening round of the tournament, but first, he posed alongside his girlfriend, Olga Sharypova.

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Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party

Mary Carillo once described Maria Sakkari's Princess Leia–looking hairstyle as a "stereophonic bun." Here's Australian Open champion Naomi Osaka's take on the trend.

Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party

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Additionally, Roland Garros champion and world No. 1 Ashleigh Barty shined bright in white ahead of her opener against Yulia Putintseva.

Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party

It's been an eventful past week for Simona Halep, who celebrated her 28th birthday, won her first-round match by a score of 6-1, 6-1, qualified for the WTA finals, and lost in the second round while suffering from back pain. Amid all that, she pulled off this casual look:

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Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party

The men, on the other hand, tend to go extravagant in Beijing, and Exhibits A and B this year were Andy Murray ...

Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party

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And Stefanos Tsitsipas:

Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party

The China Open, in a lot of ways, is a low-key highlight of the tour each year.

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The top players, particularly on the women's side, put on a show of Grand Slam-level quality. Main-draw play started over the weekend with a lineup that included a slew of major champions like Halep, Osaka, Venus Williams, Garbine Muguruza, Angelique Kerber, Karolina Pliskova and Sloane Stephens.

Stars step out in 
iconic looks at
Beijing player party

Stars step out in iconic looks at Beijing player party